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Selenium Bioavailability Through Microbes

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Title Selenium Bioavailability Through Microbes
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Creator Santhappan Paulraj
M. Senthil Kumar
U. Singh et al. (eds.)
 
Subject Biofortification
Bioavailability
Green biosynthesis
Nano-selenium
 
Description Not Available
Selenium is an important essential trace micronutrient for living systems.
Selenium in trace concentrations are essential for the growth and reproduction
of plants, animals and microorganisms; however, this essential
trace micronutrient element easily become toxic at concentrations higher
than the physiological level. Selenium deficiency is regarded as a major
health problem for 0.5–1 billion people worldwide. Oxyanions of selenium,
viz. selenite and selenate, are bioavailable; selenium in the form of
selenate ion (SeO4
2 ) is more toxic to most organisms than selenite
(SeO3
2 ). Contrarily, elemental selenium (Se0) is insoluble, less toxic
compared to other selenium forms. Nano-Se (Se0) in the range of
100–500 nm has similar bioavailability to other selenium forms into
plants, animals, humans and microorganisms. Microbial nano-selenium
biosynthesis is an eco-friendly and potentially economically viable ‘green
synthesis’ route towards synthesis of red elemental selenium and
contributes to the application of selenium for human health. In the soil,
applied selenium is rapidly reduced to insoluble forms, and usually the
crop nutrient use efficiency was less than 10 % only. Selenium addition in
commercial fertilizers may be a larger programme method that is too
wasteful, as much of the Se used thereby will be lost for future utilization.
Direct addition of selenium compounds to food (process fortification) can
be undertaken by the food industry for judicial use of this essential trace
micronutrient. Selenium is a non-renewable resource. So it should be a
concern of the all stakeholders that the extracted selenium should be
judiciously used and to be stockpiled for use as an essential nutrient
over generations.
Not Available
 
Date 2019-11-06T07:40:04Z
2019-11-06T07:40:04Z
2016-01-01
 
Type Book chapter
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/24508
 
Language English
 
Relation Not Available;
 
Publisher Springer India